Malicious PDF — malware analysis report

Static analysis result for SHA-256 011352ca97b552d9…

MALICIOUS

PDF

95.8 KB Created: 2021-07-02 19:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62b53806b3c21700eb30b55750c6e152 SHA-1: 31e14b8f53d7da995aa2175074c9c58e654edb7d SHA-256: 011352ca97b552d9e56f9e2e36fcbb123724d77d00e4b1df26251004078aec62
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed as a classic advance-fee fraud, likely to trick users into downloading further malicious payloads or divulging sensitive information. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://infrive.ru/uplcv?utm_term=best+layups+in+nba+history
    • http://urbanconstructions.org/images/uploadedimages/file/fakomijip.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/o561ic9u44km4rs047mjainh70/gevajowegonebup.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/9e68ac214613e5577883c3decc68eeb6/56293164810.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/dd17f53777cccff075aba50f165e7fe5/54120048822.pdf
    • http://chemonova.com/FCKeditor/file/78219488618.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607de4362a647---petegogivomuserabup.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a95d3ecbb98---80576765167.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbdadbd663---36709992599.pdf
    • http://allycatering.com/userfiles/mejolapukag.pdf
    • http://vattucongtrinh.com/userfiles/file/setiperodukasujolozulaw.pdf
    • https://computerzone.pk/file/fesopetuk.pdf
    • http://nage-z.com/ckfinder/userfiles/files/puzosare.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085d66b2dc6a---lesafokimeron.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5cfc92eb---14221743347.pdf
    • http://canigrup.com/userfiles/file/4230064151.pdf
    • http://ccforum.kr/uploads/file/1622745510.pdf
    • http://messtores.ca/fck_user_files/file/deviveligafefizinegepejaf.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba07d5be08a---35311227306.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/f91253d11c37e50fbb02e5198ab7b7ca/dusovofebazoronegobuvuv.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b91e5cc38---69292895302.pdf
    • http://www.proyecpapel.es/ckfinder/userfiles/files/30900480328.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/0c0093cd55cdabfdbc2903d335760941/gonojiminaben.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f74.bin
f1f47769352b20b85aec458c32b06dff4c7dd49079b71fd1a1421a12991691c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F74 18396 bytes
font_01_sfnt_off0001401f.bin
3e86a01cc72c75a42d33eeb80983c12f21cb63737bd2308b368e98ca9462013a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1401F 10756 bytes
font_02_sfnt_off000158a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x158A1 16792 bytes